Rotary kinetic fluid motors or pumps – Working fluid passage or distributing means associated with... – Plural rigidly related blade sets
Patent
1991-10-01
1993-04-13
Bertsch, Richard A.
Rotary kinetic fluid motors or pumps
Working fluid passage or distributing means associated with...
Plural rigidly related blade sets
F04D 2954
Patent
active
052018482
ABSTRACT:
An electrical downhole centrifugal pump for pumping fluids from a deep well includes a relatively small diameter pump housing which is suspended from a tubing string and including a series of impellers and diffusers. The impellers are mounted on a vertical shaft connected to a motor for driving the impellers relative to the diffusers on the housing. Upper and lower shrouds enclose the top and bottom surfaces of impeller blades rotating with the shaft. A first group of impellers are arranged to move freely longitudinally on the shaft while a second group are fixed to the shaft to prevent relative longitudinal motion. A lifting vane is formed on the outer surface of the upper shroud on the impellers which are fixed to the shaft. A net lifting force is thus applied to the shaft by those impellers of the second group having upthrust impellers to diminish the load carried by a pump shaft thrust bearing.
REFERENCES:
patent: 768911 (1904-08-01), Schoene
patent: 2228207 (1941-01-01), Forssell
patent: 4872808 (1989-10-01), Wilson
patent: 5076757 (1991-12-01), Dorsch
Bertsch Richard A.
Conoco Inc.
Holder John E.
McAndrews Roland
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